1) Install the deep learning framework you intend to use Horovod with e.g. pip3 install tensorflow

2) Run the command 

scl enable devtoolset-9 bash

3) Install Horovod with the correct bindings for your framework (these can be found at: https://horovod.readthedocs.io/en/stable/install_include.html) e.g. 

HOROVOD_WITH_TENSORFLOW=1 pip install horovod[tensorflow]
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